let canvasNest = function () {
    function n(n, e, t) {
        return n.getAttribute(e) || t;
    }
    function e(n) {
        return document.getElementsByTagName(n);
    }
    function t() {
        var t = e("script"),
            o = t.length,
            i = t[o - 1];
        return {
            l: o,
            z: n(i, "zIndex", -1),
            o: n(i, "opacity", 0.5),
            c: n(i, "color", "0,0,0"),
            n: n(i, "count", 99),
        };
    }
    function o() {
        (a = m.width =
            window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth),
            (c = m.height =
                window.innerHeight ||
                document.documentElement.clientHeight ||
                document.body.clientHeight);
    }
    function i() {
        r.clearRect(0, 0, a, c);
        var n, e, t, o, m, l;
        s.forEach(function (i, x) {
            for (
                i.x += i.xa,
                    i.y += i.ya,
                    i.xa *= i.x > a || i.x < 0 ? -1 : 1,
                    i.ya *= i.y > c || i.y < 0 ? -1 : 1,
                    r.fillRect(i.x - 0.5, i.y - 0.5, 1, 1),
                    e = x + 1;
                e < u.length;
                e++
            )
                (n = u[e]),
                    null !== n.x &&
                        null !== n.y &&
                        ((o = i.x - n.x),
                        (m = i.y - n.y),
                        (l = o * o + m * m),
                        l < n.max &&
                            (n === y && l >= n.max / 2 && ((i.x -= 0.03 * o), (i.y -= 0.03 * m)),
                            (t = (n.max - l) / n.max),
                            r.beginPath(),
                            (r.lineWidth = t / 2),
                            (r.strokeStyle = "rgba(" + d.c + "," + (t + 0.2) + ")"),
                            r.moveTo(i.x, i.y),
                            r.lineTo(n.x, n.y),
                            r.stroke()));
        }),
            x(i);
    }
    var a,
        c,
        u,
        m = document.createElement("canvas"),
        d = t(),
        l = "c_n" + d.l,
        r = m.getContext("2d"),
        x =
            window.requestAnimationFrame ||
            window.webkitRequestAnimationFrame ||
            window.mozRequestAnimationFrame ||
            window.oRequestAnimationFrame ||
            window.msRequestAnimationFrame ||
            function (n) {
                window.setTimeout(n, 1e3 / 45);
            },
        w = Math.random,
        y = {
            x: null,
            y: null,
            max: 2e4,
        };
    (m.id = l),
        (m.style.cssText = "position:fixed;top:0;left:0;z-index:" + d.z + ";opacity:" + d.o),
        e("body")[0].appendChild(m),
        o(),
        (window.onresize = o),
        (window.onmousemove = function (n) {
            (n = n || window.event), (y.x = n.clientX), (y.y = n.clientY);
        }),
        (window.onmouseout = function () {
            (y.x = null), (y.y = null);
        });
    for (var s = [], f = 0; d.n > f; f++) {
        var h = w() * a,
            g = w() * c,
            v = 2 * w() - 1,
            p = 2 * w() - 1;
        s.push({
            x: h,
            y: g,
            xa: v,
            ya: p,
            max: 6e3,
        });
    }
    (u = s.concat([y])),
        setTimeout(function () {
            i();
        }, 100);
};
export default canvasNest;
